获取vb.net中数组的所有可能的数组组合 [英] Get all posible combinations of array of arrays in vb.net
问题描述
我在VB.net中有几个数组。这些数组的长度不同,我需要它们之间的组合。简单的解决方案是使用嵌套循环,例如:
I have several arrays in VB.net. These arrays have different lengths and I need the combination between them. The simple solution is using nested loop as in the example:
Dim Array1= {10, 11, 12}
Dim Array2= {15}
Dim Array3= {1,2,3}
Dim array(2) As Object
array(0) = Array1
array(1) = Array2
array(2) = Array3
for (a = 1 to < Array1.Length - 1)
for (b = 1 to < Array2.Length - 1)
for (c = 1 to < Array3.Length - 1)
'Get combination
Next
Next
Next
Output: {10,15,1},{10,15,2},{10,15,3},{11,15,1},{11,15,2},...
但是真正的问题是数组的数量不是固定参数(如示例中的3或任何其他数字) ),因此嵌套循环不是解决方案。
But the real problem is that the number of arrays is not a fixed parameter (could be 3 as in the example or any other number) and therefore nested loops is not a solution.
有什么想法吗?
推荐答案
下面是我将近十年前仍在使用VB.Net 2003编写的一些代码的快速重写……在我的硬盘驱动器中留下了多么美好的回忆!
Here's a quick rewrite of some code I wrote almost a decade ago while still using VB.Net 2003...what great memories lying around in my hard drive!
希望您发现其输出有用:
Hope you find its output useful:
10,15,1
10,15,2
10,15,3
11,15,1
11,15,2
11,15,3
12,15,1
12,15,2
12,15,3
代码生成它的
Public Class Form1
Private WithEvents FC As ArrayCombinations = Nothing
Private Sub Button1_Click(sender As System.Object, e As System.EventArgs) Handles Button1.Click
If IsNothing(FC) Then
FC = New ArrayCombinations
FC.AddArray(New Integer() {10, 11, 12})
FC.AddArray(New Integer() {15})
FC.AddArray(New Integer() {1, 2, 3})
FC.GenerateCombos()
End If
End Sub
Private Sub FC_combinations(combos As System.Collections.Generic.List(Of System.Collections.Generic.List(Of Integer))) Handles FC.Combinations
For Each combo As List(Of Integer) In combos
Debug.Print(String.Join(",", combo.Select(Function(i) i.ToString())))
Next
FC = Nothing
End Sub
End Class
Public Class ArrayCombinations
Private Arrays As New List(Of Integer())
Private WithEvents BGW As New System.ComponentModel.BackgroundWorker
Public Event Combinations(ByVal combos As List(Of List(Of Integer)))
Public Sub New()
BGW.WorkerReportsProgress = True
End Sub
Public Sub AddArray(ByVal values() As Integer)
If Not BGW.IsBusy Then
Arrays.Add(values)
End If
End Sub
Public Sub GenerateCombos()
If Not BGW.IsBusy Then
BGW.RunWorkerAsync()
End If
End Sub
Private Sub BGW_DoWork(sender As Object, e As System.ComponentModel.DoWorkEventArgs) Handles BGW.DoWork
Dim sizes As New List(Of Integer)
Dim combinations As Integer
Dim remainder As Integer
Dim quotient As Integer
Dim combination As List(Of Integer)
Dim combos As New List(Of List(Of Integer))
If Arrays.Count > 0 Then
combinations = 1
For Each factor() As Integer In Arrays
sizes.Add(factor.Count)
combinations = combinations * factor.Count
Next
For i As Integer = 0 To combinations - 1
combination = New List(Of Integer)
For j As Integer = 1 To Arrays.Count
combination.Add(Nothing)
Next
quotient = i \ sizes.Item(sizes.Count - 1) ' Integer Division
remainder = i Mod sizes.Item(sizes.Count - 1)
combination(Arrays.Count - 1) = Arrays.Item(Arrays.Count - 1)(remainder)
For j As Integer = (sizes.Count - 2) To 0 Step -1
combination.Item(j) = Arrays.Item(j)(quotient Mod sizes.Item(j))
quotient = quotient \ sizes.Item(j) ' Integer Division
Next
combos.Add(combination)
Next
e.Result = combos
End If
End Sub
Private Sub BGW_RunWorkerCompleted(sender As Object, e As System.ComponentModel.RunWorkerCompletedEventArgs) Handles BGW.RunWorkerCompleted
RaiseEvent Combinations(e.Result)
End Sub
End Class
这篇关于获取vb.net中数组的所有可能的数组组合的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!